New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    The average of 10 numbers is 30. If one of the numbers

    is excluded, the average of the remaining numbers becomes 28. Find the excluded number.
    A 40 Correct Answer Incorrect Answer
    B 42 Correct Answer Incorrect Answer
    C 44 Correct Answer Incorrect Answer
    D 48 Correct Answer Incorrect Answer

    Solution

    Total sum of 10 numbers = 10 × 30 = 300. Total sum of 9 numbers = 9 × 28 = 252. Thus, the excluded number = 300 - 252 = 48.

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